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| author | Christian Schoenebeck <qemu_oss@crudebyte.com> | 2023-04-29 11:25:33 +0200 |
|---|---|---|
| committer | Christian Schoenebeck <qemu_oss@crudebyte.com> | 2023-05-16 16:21:54 +0200 |
| commit | f91ce58cb2eba96192bdbd730e7a0952873f6c05 (patch) | |
| tree | 7904764cd71807767724ab009a57572275a042f8 /tests | |
| parent | 1a67e07fe984e3bc9fe4b25a212e879b02e114cb (diff) | |
| download | qemu-f91ce58cb2eba96192bdbd730e7a0952873f6c05.zip qemu-f91ce58cb2eba96192bdbd730e7a0952873f6c05.tar.gz qemu-f91ce58cb2eba96192bdbd730e7a0952873f6c05.tar.bz2 | |
tests/9p: fix potential leak in v9fs_rreaddir()
Free allocated directory entries in v9fs_rreaddir() if argument
`entries` was passed as NULL, to avoid a memory leak. It is
explicitly allowed by design for `entries` to be NULL. [1]
[1] https://lore.kernel.org/all/1690923.g4PEXVpXuU@silver
Reported-by: Coverity (CID 1487558)
Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <E1psh5T-0002XN-1C@lizzy.crudebyte.com>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/qtest/libqos/virtio-9p-client.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tests/qtest/libqos/virtio-9p-client.c b/tests/qtest/libqos/virtio-9p-client.c index e4a368e..b8adc8d 100644 --- a/tests/qtest/libqos/virtio-9p-client.c +++ b/tests/qtest/libqos/virtio-9p-client.c @@ -594,6 +594,8 @@ void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries, { uint32_t local_count; struct V9fsDirent *e = NULL; + /* only used to avoid a leak if entries was NULL */ + struct V9fsDirent *unused_entries = NULL; uint16_t slen; uint32_t n = 0; @@ -612,6 +614,8 @@ void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries, e = g_new(struct V9fsDirent, 1); if (entries) { *entries = e; + } else { + unused_entries = e; } } else { e = e->next = g_new(struct V9fsDirent, 1); @@ -628,6 +632,7 @@ void v9fs_rreaddir(P9Req *req, uint32_t *count, uint32_t *nentries, *nentries = n; } + v9fs_free_dirents(unused_entries); v9fs_req_free(req); } |